Ternary assembly of g-C3N4/graphene oxide sheets /BiFeO3 heterojunction with enhanced photoreduction of Cr(VI) under visible-light irradiation

Hu, Xinjiang; Wang, Weixuan; Xie, Guangyu; Wang, Hui; Tan, Xiaofei; Qi, Jin; Zhou, Daixi; Zhao, Yunlin

doi:10.1016/j.chemosphere.2018.10.181

Cited by 79 publications

(28 citation statements)

References 47 publications

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“…Moreover, a large number of regular pores were found in the Figure 1 d–f, which further indicated that K 2 FeO 4 played an important role in the formation of new micropores during the synchronous carbonization and graphitization processes. The abundant pores could offer more adsorption sites [ 28 ]. During the synthesis process, K 2 FeO 4 was used as the activating agent.…”

Section: Resultsmentioning

confidence: 99%

Efficient Removal 17-Estradiol by Graphene-Like Magnetic Sawdust Biochar: Preparation Condition and Adsorption Mechanism

Zhou

Liu

et al. 2020

IJERPH

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The occurrence of environmental endocrine disrupting chemicals (EDCs) in aquatic environments has caused extensive concern. Graphene-like magnetic sawdust biochar was synthesized using potassium ferrate (K2FeO4) to make activated sawdust biochar and applied for the removal of 17-estradiol (E2). The characterization showed that the surface morphology of five graphene-like magnetic sawdust biochars prepared with different preparation conditions were quite different. The specific surface area and pore structure increased with the increment of K2FeO4 addition. The results have shown that graphene-like magnetic sawdust biochar (1:1/900 °C) had the best removal on E2. The experimental results indicated that pseudo-first-order kinetic model and the Langmuir model could describe the adsorption process well, in which the equilibrium adsorption capacity (qe,1) of 1:1/900 °C were 59.18 mg·g−1 obtained from pseudo-first-order kinetic model and the maximum adsorption capacity (qmax) of 1:1/900 °C were 133.45 mg·g−1 obtained from Langmuir model at 298K. At the same time, lower temperatures, the presence of humic acid (HA), and the presence of NaCl could be regulated to change the adsorption reaction in order to remove E2. Adsorption capacity was decreased with the increase of solution pH because pH value not only changed the surface charge of graphene-like magnetic sawdust biochar, but also affected the E2 in the water. The possible adsorption mechanism for E2 adsorption on graphene-like magnetic sawdust biochar was multifaceted, involving chemical adsorption and physical absorption, such as H-bonding, π-π interactions, micropore filling effects, and electrostatic interaction. To sum up, graphene-like magnetic sawdust biochar was found to be a promising absorbent for E2 removal from water.

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Section: Resultsmentioning

confidence: 99%

Efficient Removal 17-Estradiol by Graphene-Like Magnetic Sawdust Biochar: Preparation Condition and Adsorption Mechanism

Zhou

Liu

et al. 2020

IJERPH

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“…In our previous study, the XRD patterns of the g-C 3 N 4 showed two characteristic peaks at 13.0 and 27.4 , corresponding to reections from the (100) and (102) crystal planes of g-C 3 N 4 (JCPDS 87-1526), respectively. 32,33 XRD analysis ( Fig. 2a) showed that the pattern of SAC featured two characteristic peaks that are same as that of g-C 3 N 4 .…”

Section: Photoelectrochemical Measurementsmentioning

confidence: 87%

“…C1s of SABC-3 in Fig. 3a can be deconvoluted into 6 peaks, at 284.61, 284.81, 285.30, 286.72, 288.21, and 289.00 eV, belonging to C-N, C-C, C-O, C-O-C, N-C]N and O-C]O units, respectively 32,33. The N1s spectrum shown inFig.…”

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confidence: 93%

Three-dimensional microspheric g-C₃N₄coupled byBroussonetia papyriferabiochar: facile sodium alginate immobilization and excellent photocatalytic Cr(iv) reduction

Xie

Cai

et al. 2020

RSC Adv.

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“…For BiFeO 3 , the major peaks assigned to the (012), (104), (110), (006), (202), (024), (116), (122), (018), (202), (214), (300), (208), and (220) planes indicated planar BiFeO 3 with a single-phase perovskite structure (JCPDS No. 20-169) [27,34]. The biochar exhibited a broad diffraction peak near 24 • , which suggested that it contained amorphous carbon [35].…”

Section: Regeneration and Reuse Experimentsmentioning

confidence: 98%

“…At a certain temperature, a multiferroic functional material undergoes spontaneous magnetization and polarization reactions [26]. Sometimes, spontaneous strain reactions will also occur [27]. BiFeO 3 is known as an extremely rare multiferroic material that exhibits both ferroelectricity and antiferromagnetism at 25 • C [23,28].…”

Section: Introductionmentioning

confidence: 99%

Design and Preparation of Chitosan-Crosslinked Bismuth Ferrite/Biochar Coupled Magnetic Material for Methylene Blue Removal

Cai

Jiang

Liu

et al. 2019

IJERPH

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Biochar obtained by pyrolysis of the fiber plant kenaf was mixed with bismuth ferrite (BiFeO3) in a chitosan-containing acetic acid solution, magnetized, and modified to prepare a chitosan-crosslinked BiFeO3/biochar coupled magnetic material. The adsorption properties of the composite were investigated using methylene blue dissolved in water, and the effects of external conditions, such as pH, methylene blue concentration, reaction time, and temperature, on the adsorption performance were studied. The adsorption data were fitted and analyzed with kinetic and isotherm models, and the results showed that the BiFeO3/biochar coupled magnetic material effectively adsorbed methylene blue. The amounts adsorbed onto this magnetic material increased with increasing initial methylene blue concentration, reaction time, and temperature, and the adsorption performance improved under neutral and alkaline conditions. The pseudo-first-order kinetic and Langmuir isotherm models satisfactorily fitted the adsorption data, showing that the adsorption of methylene blue involved both chemical and physical adsorption. The maximum adsorption capacity of methylene blue onto the BiFeO3/biochar coupled magnetic material reached 18.942 mg·g−1 at 25 °C, confirming the excellent dye binding activity of this material.

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Ternary assembly of g-C3N4/graphene oxide sheets /BiFeO3 heterojunction with enhanced photoreduction of Cr(VI) under visible-light irradiation

Cited by 79 publications

References 47 publications

Efficient Removal 17-Estradiol by Graphene-Like Magnetic Sawdust Biochar: Preparation Condition and Adsorption Mechanism

Efficient Removal 17-Estradiol by Graphene-Like Magnetic Sawdust Biochar: Preparation Condition and Adsorption Mechanism

Three-dimensional microspheric g-C₃N₄coupled byBroussonetia papyriferabiochar: facile sodium alginate immobilization and excellent photocatalytic Cr(iv) reduction

Design and Preparation of Chitosan-Crosslinked Bismuth Ferrite/Biochar Coupled Magnetic Material for Methylene Blue Removal

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Ternary assembly of g-C3N4/graphene oxide sheets /BiFeO3 heterojunction with enhanced photoreduction of Cr(VI) under visible-light irradiation

Cited by 79 publications

References 47 publications

Efficient Removal 17-Estradiol by Graphene-Like Magnetic Sawdust Biochar: Preparation Condition and Adsorption Mechanism

Efficient Removal 17-Estradiol by Graphene-Like Magnetic Sawdust Biochar: Preparation Condition and Adsorption Mechanism

Three-dimensional microspheric g-C3N4coupled byBroussonetia papyriferabiochar: facile sodium alginate immobilization and excellent photocatalytic Cr(iv) reduction

Design and Preparation of Chitosan-Crosslinked Bismuth Ferrite/Biochar Coupled Magnetic Material for Methylene Blue Removal

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Three-dimensional microspheric g-C₃N₄coupled byBroussonetia papyriferabiochar: facile sodium alginate immobilization and excellent photocatalytic Cr(iv) reduction